Depends on how picky you are...
My own journey down the same road on my '68 GTX last year led to a lot of researching, digging,
searching for individual parts since I insisted ALL parts be USA manufactured - which they aren't
these days.
Suffice to say, if that's going to be your tack too - well, nobody has that magic answer, sorry.
I replaced
everything from the backing plates out, all 4 corners AND converted my '68 to self-adjusters
front and rear to boot, adding to the challenge of finding original USA stuff.
Some wound up being NOS - some more wound up being brand name aftermarket.
A lot of it wound up being considerably older, too.
I can about guarantee some of the parts I rounded up for mine, you ain't gonna find any more of, either.
Does it matter if you only use USA-made stuff?
Yes.
More than you realize right now - but you'll find that out too, if you decide at first it doesn't.
Google is your friend, Bob's your uncle, get to work and good luck!
